function showTab(m,n){
	
	var menu = document.getElementById("tab").getElementsByTagName("li");
	for(i=0;i<menu.length;i++){
		menu[i].className = (i+1)==n?"col":"";
		var showdiv = document.getElementById("" + m + (i + 1));
		if( n == i + 1 ){
			showdiv.style.display = "block";
		} else {
			showdiv.style.display = "none";
		}
		
	}
}